試題詳解

18. What is the primary purpose of RNA polyadenylation in eukaryotic cells?
(A) To prevent the formation of secondary structures in the coding region of the mRNA.
(B) To enhance transcription elongation by stabilizing RNA polymerase on the DNA template.
(C) To promote the export of mRNA from the nucleus and increase its stability and translational efficiency.
(D) To remove introns from pre-mRNA during RNA splicing.
(E) To initiate translation by providing a binding site for ribosomes at the 5' end of the mRNA.